Allowance certificates
(A) On commencement of employment On or before the date of the commencement of employment with an employer, the employee shall furnish the employer with a signed withholding allowance certificate relating to the withholding allowance claimed by the employee, which shall in no event exceed the amount to which the employee is entitled.
(B) Change of status If, on any day during the calendar year, an employee’s withholding allowance is in excess of the withholding allowance to which the employee would be entitled had the employee submitted a true and accurate withholding allowance certificate to the employer on that day, the employee shall within 10 days thereafter furnish the employer with a new withholding allowance certificate. If, on any day during the calendar year, an employee’s withholding allowance is greater than the withholding allowance claimed, the employee may furnish the employer with a new withholding allowance certificate relating to the withholding allowance to which the employee is so entitled, which shall in no event exceed the amount to which the employee is entitled on such day.
(C) Change of status which affects next calendar year If on any day during the calendar year the withholding allowance to which the employee will be, or may reasonably be expected to be, entitled at the beginning of the employee’s next taxable year under subtitle A is different from the allowance to which the employee is entitled on such day, the employee shall, in such cases and at such times as the Secretary shall by regulations prescribe, furnish the employer with a withholding allowance certificate relating to the withholding allowance which the employee claims with respect to such next taxable year, which shall in no event exceed the withholding allowance to which the employee will be, or may reasonably be expected to be, so entitled.